Steam-trap.



J. H. BLESSING. STEAM TRAP.

APPLICATION FILED JAN. 9, 1905.

PATENTED JULY 17, 1906.

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. PATENTED JULY 17, 1906. J. H. BLESSING.

STEAM TRAP. APPLICATION FILED JAN, 9, 1905.

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TTNTTED STATES PATENT onnron.

STEAM-TRAP.

Specification of Letters Patent.

Patented July 17, 1906.

Application filed Ianuary 9. 1905. Serial No. 240,165-

To all whom it may concern:

Be it known that 1, JAMES H. BLESSING, a citizen of the United States of America, and a resident of Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Steam- Traps, of which the following is a specification.

My invention relates to steam-traps adapted to return the water of condensation to a boiler, and has for its objects to provide means adapted to oiierate a trap having a receiving-chamber of any desired dimensions and to empty the entire contents of such chamber at each operation of the trap. These objects I accomplish by the means illustrated in the accompanying drawings, in which Figure 1 is a vertical elevation of a trap embodying my invention connected with a steam-boiler. Fig. 2 is a vertical section of the operative parts of the trap with the receiving-chamber shown in vertical elevation.

As illustrated in the drawings, the trap has a tubular connection extending from the trap to the steam-section of a boiler 1 and provided with a valve 3. Such connection communicates with a pressure-equalizing valve arranged within a casing 2. valve-casing is provided with a steam cham ber 4 and a cylinder 6, openinginto the steamchamber. A piston 5, provided with a spring 7, is arranged within the cylinder 6 and is connected with a valve-stem 8, having a valve 8 secured thereto, which has its seat on a partition formed in the valve-casing. The valve-ste1n 8 is provided with collars 8 adapted to engage the bifurcated end of a pivoted lever 9, the opposite bifurcated end of which lever engages a valve-stem 10", which is secured to an exhaust-valve 10, communicating with the receiving chamber 16 and provided with an exhaust 10.

The ends of the valve-stem 1O preferably engage upper and lower sockets 10 formed in the valvecasing. A tubular connection 1 1 extends from the cylinder 6 of the equalizing-valve to the cylinder 12 of an auxiliary valve. -A valve 13 is arranged within the cylinder 12 and is secured to a valve-stem 13, which is pivotally connected with a lever 22 hinged at one end to a bracket 23. The opposite end of the lever 22 is pivoted to a vertical rod 24, which is secured to a float 14, inclosed within a chamber 15. This chamber communicates with the upper portion of the This receiving-chamber 16 by means of the tubular connections 15 and 16 Tubular connections also extend from the lower portion of the float-chamber 15 and receiving-chamber 16 to the water-section of the boiler 1 and are provided with a check-valve 20, ada ted to prevent water flowing back into the oatchamber 15, and a similar valve 21, adapted to prevent water from flowing back into the receiving-chamber 16. The upper portion of the receiving-chamber 16 is also connected with a coil of pipes from which the water of condensation passes through a check-valve 17 into the receiving-chamber. The several parts of the operating mechanism of the trap are shown in the'position assumed by them when there is no water in the trap, the equalizing-valve 8 on its seat, the exhaustvalve 10 off its seat, and the auxiliary floatactuatedvalve 13 also on its seat.

When the trap is in operation, the va1ve3 is open, so as to permit steam to pass from the boiler into the steam-chamber 4 of the valvecasing 2 and between the piston 5 and the valve 8. The piston being preferably of greater area than that of the valve is for an instant forced upward; but the piston 5 is provided with a small aperture 6*, which permits steam to passfrom the chamber 4 to the upper portion of the cylinder 6 above the piston 5, thereby equalizing the pressure above and below the piston and enabling the spring 7 and the weight of the valve 8 and piston 5 to force the valve 8 down on its seat. at the same time raising the exhaust-valve 10 from its seat. The air in the receiving-chamber then passes out through the valve-opening and exhaust-pipe 10, and the water of condensation which falls to the bottom of a coil of pipes passes through a drip-pipe and into the receiving chamber 16 through the check-valve 17. Such water gradually fills the chamber 16, and when it reaches the level of the tube 16 it overflows from the receiving-chamber through the tubes 16 and 15 into the float-chamber 15. When a suflicient qluantity of water has entered the chamber to ift the float 14, the auxiliary valve 13, which is connected with the float by means of the rod 2 1 and lever 22, will be raised from its seat, thereby permitting the steam above the piston 5 in the cylinder 6 to escape to the atmosphere through the connecting-pipe 11 and exhaust-opening 13 The steam-pressure being then removed from-the upper portion of the piston 6, the boiler-pressure acting on the under side of the piston will cause the piston to rise, carrying with it the valve 8 and at the same time causing the pivoted lever 9 to draw the exhaust-valve 10 down on its seat. The valve 8 being opened, the steam from the boiler enters the receivingchamber 16 and causes an equalization of pressure between that of the boiler and the trap. The trap is placed above the Waterlevel of the boiler, so that the water will gravitate out of the receiving-chamber into the boiler through the pipe 18 and check-valve 21. This pipe being large and straight permits the water to pass out of the receivingchamber faster than out of the float-chamber 15; but when the level of the water in the chamber 16 recedes below the line of the bottom of the float-chamber 15 the water in the float-chamber begins to pass out of its chamber, the float 14, connected with the valve 13, drops, closing the valve 13 and preventing the further escape of steam from the cylinder 6 through the outlet 13 The steam-pressure above and below the piston 5 then becomes equalized by means of the small aperture 6 in the piston 5, and the spring 7 again closes the valve 8 and opens the exhaust valve 10.

In using the trap on a small amount of heating-surface it may not be necessary to allow the full exhaust from the receivingchamber, and if so it may be regulated by a hand-operated stop-valve placed in the exhaust-pipe 10. By the use of such valve having either a full or a reduced opening the pressure in the receiving-chamber Will soon become reduced sufliciently to enable the pressure in the coil of heating-pipes to again cause the water to be forced into the cylinder and repeat the, first operation. It may be desired at times to have the trap discharge When it is only partially filled with water. To this end a hand-operated valve may be connected with the pipe 11, by opening which the steam above the piston 5 is permitted to escape into the atmosphere, the valve 8 is lifted ofl its seat by the steam in r the chamber 4 acting on the under side of the piston 5, the steam from the boiler enters the receiving-chamber and equalizes the pressure therein with that of the boiler, and the receiving-chamber discharges itself.

What I claim as new, and desire to secure by Letters Patent, is

1. In a steam-trap, the combination With a receiving-chamber, of an equalizing-valve connected with said chamber, an auxiliary valve adapted to operate the equalizingvalve, a float-chamber having an inlet connected with the receiving-chamber and an outlet connected with the outlet from the receiving-chamber, and a float arranged Within the float-chamber adapted to operate the auxiliary valve, substantially as shown and described.

2. In a steam-trap, the combination with a receiving chamber, of a steam actuated equalizing-valve connected with said chamber, an exhaust-valve connected with said chamber and operated by the equalizing valve, an auxiliary valve adapted to operate the equalizing-valve, a float-chamber having an inlet connected with the upper portion of the receiving-chamber and an outlet connected with the outlet from the receivingchamber, and a float arranged Within the float-chamber adapted to operate the auxiliary valve, substantially as shown and described.

3. In a steam-trap, the combination with a receiving-chamber, of a float-chamber having an inlet connected with the upper ortion of the receiving-chamber and an out et connected with the outlet from the receivingchamber, and a check-valve arranged between the outlets of the float and receiving chambers, substantially as shown and described.

4. In a steam-trap, the combination of a receiving-chamber, and a float-chamber having an inlet connected with the upper portion of the receiving-chamber and an outlet connected with the outlet of the receiving-chamber but smaller than said outlet, whereby the receiving-chamber is adapted to be filled and emptied in advance of the float-chamber, substantially as shown and described.

Signed at Albany, New York, this 21st day i of July, 1904.

JAMES H. BLESSING.

Witnesses:

H. W. GARFIELD, ROBERT W. HARDIE 

